Who knows what a disk array is and what does a disk array mean in Disk Array explained

RAID is the abbreviation of Redundant Array of Inexpensive Disks in English, and the Chinese abbreviation is Redundant Array of Inexpensive Disks. RAID is a redundant array of multiple hard disks. Although RAID contains multiple hard drives, it appears as a large and independent storage device under the operating system.

There are three main benefits of using RAID technology for storage systems: Provides disk spanning by grouping multiple disks together as a logical volume By dividing data into multiple blocks and writing them in parallel Read out multiple disks to increase the speed of disk access Fault tolerance through mirroring or validation operations When RAID was originally developed primarily for cost savings, several small-capacity hard drives combined were lower than large ones. At the moment, RAID is not very cost-effective, but RAID can take full advantage of multiple hard drives, achieving speeds and throughput far beyond any single hard drive.

In addition to the performance improvements, RAID can also provide good fault tolerance and continue to work in the event of a problem with either hard drive without being affected by damage to the hard drive. RAID technology is available in several different tiers that offer different levels of speed, security, and value for money. Selecting the appropriate RAID level can meet your requirements for storage system availability, performance, and capacity.

The commonly used RAID levels are as follows: NRAID, JBOD, RAID 0, RAID 1, RAID 0+1, RAID 3, RAID 5, etc. Currently, RAID 5 and RAID (0+1) are often used. ]

Disk arrays are referred to as RAID (Redundant Arrays of Inexpensive Disks, RAID), which means "** cheap and redundant disk arrays". The principle is to use the array method as a disk group, with the design of data scattered arrangement, to improve the security of data. Disk arrays are mainly aimed at hard disks, which cannot keep up with the development of CPU and memory in terms of capacity and speed, and propose ways to improve them.

A disk array is a large disk group composed of many cheap, smaller, more stable, and slower disks, which use the additive effect of individual disks to provide data to improve the performance of the entire disk system. At the same time, when storing data, this technology is used to cut the data into many sections and store them on each hard disk

1. Redundant arrays of independent disks (RAID) means "redundant arrays with redundancy capabilities composed of independent disks".

2. The disk array is composed of many independent disks, combined into a disk group with huge capacity, and the additional effect generated by the data provided by individual disks improves the efficiency of the entire disk system. Using this technology, the data is sliced into many segments and stored on separate hard drives.

3. The disk array can also use the concept of parity check, and the data can still be read out when any hard disk in the array fails. When data is reconstructed, the data can be calculated and re-placed into a new hard drive.